GHM DeltaOHM HD2010UC, Руководство по эксплуатации, Страница: 77 / 134

HD2010UC
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V4.2
Input Gain [dB] Parameter
Lower Limit
[dB]
Upper Limit
[dB]
30
LpA 33
111 LpC 37
LpZ 40
LpkC 50
114
LpkZ 52
40
LpA
31
101 LpC 36
LpZ
40
LpkC 50
104
LpkZ 52
The starting level for the linearity range detection matches the reference level (94 dB) at 1
kHz. With different frequencies, the starting level takes into account the attenuation of the frequen-
cy weighting being measured. In the secondary fields the starting level is subject to the same incre-
ment of the input gain.
Integration Time
It can be set from a minimum of 1s to a maximum of 99 hours.
Measurement Dynamics with Electromagnetic Fields
Minimum measurable level equal to 60dBA with carrier from 26 MHz to 1 GHz and amplitude
equal to 10V/m modulated 80% at 1 kHz.
Reference Conditions

The measuring range is that with input gain equal to 10 dB.

The level corresponds to 94 dB.

The acoustic calibration can be performed at a sound level included in the range 94dB ÷
124dB.

The reference direction of the acoustic signal is that of the preamplifier longitudinal axis.

The reference acoustic field is the free field
Operating conditions

Storage temperature: -25 ÷ 70°C.

Operating temperature: -10 ÷ 50°C.

Working relative humidity: 25 ÷ 90%RH, not condensing.

Static pressure: 65 ÷ 108kPa.

Protection degree: IP64.
In case of condensation growth, it must evaporate completely before using the sound level
meter.
Drifts

Temperature: ± 0.3 dB over the range -10 ÷ 50°C (with correction for microphone drift acti-
vated).

Relative humidity: ± 0.3 dB over the range 25 ÷ 90%RH, not condensing.

Static pressure: ± 0.3 dB over the range 65 ÷ 108kPa.